Make dough:Combine flour, salt. Add enough water to make the dough. The dough should not wet. Make into golf ball size balls and dip in vegetable oil. The balls must be completely covered in oil.

Make filling:Mash the potatoes. Finely chop the leeks. Stir fry the onions in a pan for about 4-5mins under low heat. Add the leeks and stir fry for a few more minutes.Add the potatoes. Add salt and pepper to taste.

The dough ball must be soaked in the oil for at least 4 hours, before the next step.

Stretch the dough ball in a plate as shown in the picture.

Put the filling into the middle of the roti, according to the shape you desire.

Fold the edges to cover the fillng.

Heat a pan over moderate heat. Cook the roties on all sides, till each side turn a golen brown color.